Condensing-steam-turbine installation



K BAUMANN AND A. E. L. SCANES. CONDENSING STEAM TURBINE INSTALLATION. I

APPLICATION FILED DEC.28, I920.

Patented Mar. 29, 1921.

a SHEETS-SHEET 1.

ATTORNEY K. BAUMANN AND A. E. L. SCANES.

CONDENSING STEAM TURBINE INSTALLATION.

APPLICATION FILED DEC.28, 1920.

1,372,930; Patented Mar. 29, 1921.

3 SHEETS-SHEET 2.

ATTORNEY K. BAUMANN AND A. E. L. SCANES.

CONDENSING STEAM TURBINE INSTALLATION.

APPLICATION FILED DEC.28. T920.

Patented Mar. 29, 1921.

3 SHEETSSHEET 3.

ATTORNEY UNITED STATES PATENT OFFICE.

KARL IBA'UMANN, OF URM STON, AND ARTHUR EDWIN LEIGH SCANES, 0F ASHTON-0N.. MERSEY, ENGLAND, ASSIGNORS TO THE BRITISH WESTINGHOUSE ELECTRICAND MANUFACTURING COMPANY LIMITED, A COMPANY OF GREAT BRITAIN.

\ coNnENsrNe-srEAM-rriaBmE INSTALLATION.

1,372,930, Specification of Letters Patent. Patented lu u 29 1921Original application filed January 31, 1917, Serial No. 145,709.Divided;

and this application filed December 23, 1920. Serial no. 433,724.

To all whom it may concern Be it known that we, KARL BAUMANN, a citizenof the Confederation of Switzerland, and a resident of Urmston, in thecounty of Lancaster, England, and AR'rHUn EDWIN LEIGH SoANEs, a subjectof the King of Great Britain, and a resident of Ashton-on- Mersey, inthe countyof Chester, England, have invented a new'and usefulImprovement in or Relating to Condensing-Steam- Turbine Installations,which is a division of application Serial No. 145,709, filed Jannary 81,1917,.and of which the followlng is a specification.

In condensing steam turbine installations it has already been proposedto divide up the steam'fiowing from the last row or rows of blades ofthe turbine to the condenser by means of guide walls, diaphragms or thelike located in the exhaust casing of the turbine, and the presentinvention relates to condensing steam turbine installations in which theexhaust casing of the turbine is provided with such guide walls,diaphragms or the like, and has for its object to provide an improvedconstruction and arrangement of' condenser for use with a turbine of theabove kind.

In a surface condenser the temperature of tion comprising a turbine anda surface condenser'there is a tendency for steam to be drawn by thecooler condensing surface from portions of the exhaust outlet of theturbine other than those portions located immediately above the coolercondensing surface. This tends to increase the-length of denser and toincrease the cordingly. able in condensers of tact type.

In order to obviate this difiiculty, according to the present inventionsome or all of pressure drop acthe jet or direct conthe aforesaid guidewalls, diaphragms or'the like, in the exhaust casing of the turbine areA similar effect is also observcontinued beyond the exhaust outlet ofthe turbine through into the condenser itself in such a manner that thecondenser is divided up into a number of compartments each of which willact as a separatecondenser.

Stated in another way, the condenser is provided with partitions orthelike adapted to form continuations of some or all of the guide Walls,diaphragms or the like in the exhaust casing of the turbine, whichpartitions divide 'up 'the condenser into a plurality of compartments insuch a manner way constitute in effect a" single flow condenser, butalthough. in this way the temperature of the water in each compartmentof the condenser is rendered as uniform as possible, the temperature ofthe Water in the several compartments of the condenser will differ.

Several constructional forms vwhich the invention may take areillustrated byway of example in the accompanying drawings in which F iure l is "a vertical section online 1-1 of *ig. 2 through the exhaustcasing of a turbine and a. condensen'the latter invention beingconstructed in accordance with this Fig. 2 is a sectionalview taken onthe line IIe-II of Fig. 1.

Figs. 3 and 4 are fragmentary views on an enlarged scale and Fig. 5 aview on the same scale taken on the lines III-III, IV-IV and V- V,respectively of Fig. 2.

Figs. 6 and 7 are diagrammatic views of a turbine and of a-condenser,the latter constructed in accordance with this invention in which thearea of the condensing surface of the compartments into which thecondense'r is divided varies.

; Figs. 8. and 9am diagrammatic views r to condensers I type.

, to independent portions of a condenser.

' diaphragm divided into two paths,

showing how the invention may be applied of thedirect contact or jet nowto Figs. 1 to 5, the exhaust the turbine is provided with a of the kindfully described and illustrated in the specification of British PatentNo. 2,848 of 1914. The condenser 2 is furnished with a central partitionwall 3 which-extends to and forms joint with the guide wall 4 in theturbine exhaust and the point of junction of the V shaped containingwalls 6, 6 of the exhaust casing of the turbine. The condenser is alsoprovided with a longitudinal partition wall 7, which extends upward tillit meets the lower edge ofthe diaphragm 8 extending across the exhaustcasing of the turbine. For a purpose hereinafter explained both thepartition walls 3 and 7 extend downward into the condensate Referrintgcasing 1 o extraction chamber 9 from which the usual condensatedischarge outlet 10 leads to the extraction pump 11. In this way thecondenser is divided into four separate com partments. As shown in Figs.3 and 4, the walls 6, 6 as well as the wall 4 should be carried right upto the last row of moving blades 12 so that only a small clearanceexists between said walls and the moving blades in order to preventleakage from one compartment of the exhaust casing into another. Thesame is true also of the diaphragm 8 where it adjoins the moving blades12. From the drawings, it will be seen that the diaphragm and partitionmembers of theexhaust casing extendclosely adjacent to the last row ofmoving blades and transversely to the plane of rotation thereof, wherebythe annulus of steam discharged therefrom is immediately divided up intoa plurality of arcuate portions. The water inlet to the condenser isshown at 13 and the water outlet at 14, the condenser here shown, aswill be readily perceived, being of the double flow type. Hence thewater flows in one dlrection only through each of the four compartmentsinto which the condenser is divided by the partition walls 3 and 7.

It will be seen that we have devised an arrangement whereby from a lastrow of blades is divided and led In thesteam discharged is whereas inFigs. 1'4c, inclusive, the steam is divided into four paths. We preferto divide the condenser into four condensing portions, two portionsbeing arranged near the plane of the last row of blades and the othertwo being arranged fartheraway. With this arrangement, the steamdischarged from the last row of blades may be. divided into fourportions, the two lower portlons being discharged by curved Figs. 6-9inclusive,

' passageways into the condenser portions the steam discharged the'upperportions of steam being conducted by passageways curved over thelower-portion passage-ways to the other condensing portions.

As hereinbefore set forth, the important feature of our invention is thedivision of the exhaust of a plurality of portions and leading eachportion to an independent condensing portion of a condenser. Thepresence of diaphragms in the exhaust casing to divide the exhaustfacilities the passage of the latter to the condenser with smaller eddylosses than ordinarily. The division of the condenser into a pluralityof independent condensing portions is responsible for condensationtaking with a slight drop in pressure of the steam and non-condensablegases and vapors.

lVhile we have shown my invention in a number of forms, it will beobvious to those skilled in the art that it is not so limited but issusceptible of various other changes and modifications, withoutdeparting from the spirit thereof and we desire, therefore, that onlysuch limitations shall be placed thereupon as are imposed by the priorart or as are specifically set forth in the appended claims.

What we claim is l. A power installation comprising a steam turbine, acondenser, partitions for dividing the condenser into a plurality ofindependent condensing portions, an exhaust casing for the turbinecommunicatin with the condenser, and partition or diaphragm members fordividing the discharge of the last row of moving blades into a pluralityof portions and cooperating with the exhaust casing and the condenserpartitions to define continuous passageways to the independentcondensing portions for the divided portions of steam.

2. A power installation comprising a turbine, a condenser disposedtransversely of the turbine axis, a portion dividing the condenser intoindependent condensing portions, an exhaust casing for the turbine, andpartition or diaphragm members for dividing the discharge of the lastrow of blades into a plurality of ortions and cooperat ng with thecasing an the condenser partltion to define continuous passageways forconducting each steam portion to an independent condensing portion.

3. A power installation comprising a turbine, a condenser, partitionsfor dividing the condenser into a plurality of independent condensingportions, an exhaust casing for the turbine communicating with thecondenser, and partition or diaphragm members extending close to thelast row of movplace more uniformly and ing blades and transversely tothe plane of operating with the exhaust casing and the condenserpartitions to define continuous passageways to the independentcondensing portions for the divided portions of steam.

4. A power installation comprising a turbine, a condenser, partitionsfor dividing the condenser into a plurality of condensing portions, anexhaust casing for the turbine cornmunicating with the condenser andpartition members carried by the casing for dividing the exhaust of thelast row of blading into tWo upper portions and two lower portions andcooperating with the casing to define continuous passageways for eachsteam portion to an independent condenser portion,

the passageways for the upper portions be-- ing curved over thepassageways for the lower portions.

5. A power installation comprising a turbine, a condenser arrangedcrosswise of the turbine axis, partitions for dividing the condenserinto four condensing portions, two

,portions being spaced farther away from the plane of the last row ofblades than the other two portions, an exhaust casing for the turbinecommunicating with the condenser, partition members carried by* thecasing for dividing theexhaust of the last row of blades into two upperportions, and two lower portions and cooperating with the casing todefine continuous passage-ways for each portion to an independentcondenser portion, the passageways forthe lower por tions discharginginto the condenser portions nearer the plane of the last row of bladesand the passageways for the upper portions being curved over thepassageways for the lower portions and discharging into the othercondenser portions.

In testimony whereof, we have hereunto subscribed our names this 29thday of October 1920.

KARL BAUMANN. ARTHUR EDWIN LEIGH SCANES.

